gefran DIGISTAR II Installation And Operation Manual page 13

Keyboard and led matrix (7)
Connection for keyboard interface.
Synchronous serial with communication protocol GT-Tast, Gefran property.
It has 128 keys and 64 leds. Maximum length of connection 100 cm.
Connector type RJ45 8 poles.
External battery (8)
Modu II 2 pole AMP connector, for connection to an external battery
in order to maintain the BIOS data and the data stored in the static
ram on the Motherboard.
The battery must be maximum 3 to 3.6V.
The external battery must not be recharged. When the
external battery is used the internal one is not used.
80544B_MHW_DIGISTAR II - DIGISTAR II Control - GF-BOX_02-2013_ENG
KEY & LED
Pin number Signal
1 Key_CLK
2 Key_OUT
3 Key_IN
4 n.c
5 +5V
6 GND
7 GND
8 +12V
Note: nc. = do not connect !!!
Do not use supply input for external
equipment excluding the keyboards
provided by Gefran
EXTERNAL BATTERY
Pin number Signal
1 + battery
2 - battery
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